D Practice for Outdoor Weathering of Plastics3 4 Discontinued; see Annual Book of ASTM Standards, Vol 5 Annual Book of. astm d 塑料的室外风化 – Designation: D – 99 Standard Practice for Outdoor Weathering of Pl. Find the most up-to-date version of ASTM D at Engineering
|Published (Last):||10 July 2011|
|PDF File Size:||10.68 Mb|
|ePub File Size:||3.35 Mb|
|Price:||Free* [*Free Regsitration Required]|
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their x1435 responsibility. Fasteners used to attach specimens to the test rack shall provide for secure attachment but allow specimens to expand or contract with thermal changes, moisture absorption or desorption, or plasticizer loss.
The angle of the exposure rack relative to the horizontal can vary depending upon the end-use conditions that are being evaluated.
Proceed to Checkout Continue Shopping. The results of tests conducted for less than twelve months will depend on the particular season of the year in which they begin.
The effect of backing is highly signi?
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. An inherent limitation in solar-radiation measurements is that they s1435 not re?
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Several years of repeat exposures are needed to get an average test result for a given location.
astm d 塑料的室外风化_百度文库
All materials of an unknown end use application will normally be run in an 5. For instance, summer exposures are generally more severe than winter exposures. NOTE 9—The average UV radiant exposures shown for subtropical and desert climates are based on several years of measurement in these astk environments.
Table 1 shows typical UV radiant exposures for 12 months in subtropical and desert climates. This standard has been approved for use by agencies of the Department of Defense. It is convenient to group specimens to be removed from exposure at the same time in one holder. NOTE 8—The results for exposure stages of less than one year will depend on the season of the year in which the exposure was made. Link to Active This link will always route to the current Active version of the standard.
This method of mounting is shown in Fig. It is intended for use with? It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a different location.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Note 2 — This standard and ISO Exposures in several locations with different climates that represent a broad range of anticipated service conditions are awtm. You may delete a document from your Alert Profile at any time. This standard is also available to be included in Standards Subscriptions. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Calculate retention of characteristic property according to Practice D when it is reported. It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a different location. Precision and Bias Originally published as D — 56 T. Note 1 — See Practice Axtm for aging under glass.
The exposure stages must be regarded as providing only a general indication of d14355 degree of exposure, and the results should always be considered in terms of characteristics of the exposure site as well. Add to Alert PDF. NOTE 7—The same exposure stage by whichever method is used will not necessarily give the same changes in properties of the test specimen at different exposure sites.
The results of tests conducted for less than 12 months will depend on the particular season of the year in which they begin. Need more than one copy? Exposure test specimens should be large r1435 that mounting edges may be removed where evaluation test results would otherwise be affected. These are dependent on the ASTM test methods for the speci? They shall d14335 covered with inert wrapping to exclude light exposure during the exposure period.
Historical Version s – d435 previous versions of standard. Please first log in with a verified email before subscribing to alerts. The relative durability of plastics in outdoor use can be very different depending on the location of the exposure because of differences in ultraviolet UV radiation, time of wetness, temperature, pollutants, and other factors.
astmm The structural members of the test racks shall not constitute a backing to the specimens under test. We have no amendments or corrections for this standard.
Specimen holders should be used to support the many sizes of specimens involved in this testing.
ASTM D1435 – 13
This standard is not included in any packages. Subscription pricing is determined by: Your Alert Profile lists the documents that will be monitored. If the document is revised or amended, you will be notified by email.
A number in parentheses indicates the year of last reapproval. It is the responsibility qstm the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Climatological variations within these xstm may include those represented by desert, seashore salt airindustrial locations, tropical, and subtropical regions, plus areas exhibiting a wide range in solar radiant energy.